[master] Set signal action to ingore for SIGPIPE

[thirdparty/dhcp.git] / omapip / isclib.c

diff --git a/omapip/isclib.c b/omapip/isclib.c
index 3e5e1c2b30e2eaec1d2ebb70270bd42a62e2ecfe..13f0d3ebca9c10203ccebc4d476563da0a954246 100644 (file)
--- a/omapip/isclib.c
+++ b/omapip/isclib.c
@@ -120,6 +120,20 @@ isclib_cleanup(void)
        return;
 }
 
+/* Installs a handler for a signal using sigaction */
+static void
+handle_signal(int sig, void (*handler)(int)) {
+       struct sigaction sa;
+
+       memset(&sa, 0, sizeof(sa));
+       sa.sa_handler = handler;
+       sigfillset(&sa.sa_mask);
+       if (sigaction(sig, &sa, NULL) != 0) {
+               log_debug("handle_signal() failed for signal %d error: %s",
+                          sig, strerror(errno));
+       }
+}
+
 isc_result_t
 dhcp_context_create(int flags,
                    struct in_addr  *local4,
@@ -176,6 +190,11 @@ dhcp_context_create(int flags,
                        return (result);
                dhcp_gbl_ctx.actx_started = ISC_TRUE;
 
+               /* Not all OSs support suppressing SIGPIPE through socket
+                * options, so set the sigal action to be ignore.  This allows
+                * broken connections to fail gracefully with EPIPE on writes */
+               handle_signal(SIGPIPE, SIG_IGN);
+
                result = isc_taskmgr_createinctx(dhcp_gbl_ctx.mctx,
                                                 dhcp_gbl_ctx.actx,
                                                 1, 0,